Downloaded iReport-4.6.0 for Linux and when creating a new report via the File->New... menu, the new report is not shown in the preview, but the error message cvc-comp
If you're using ireport 4.6 or greater, the best way to solve the issue with uuid is, use the similar ireport 4.6 or greater, as the uuid attribute is newly introduce from version 4.6. otherwise If you remove the uuid manually from the jrxml file, the uuid will again be placed in corresponding tags on the next compilation...